Here is a Conoco Wayne 100-A in Hutchinson, KS. This photo comes from the Conoco Collectors Bible book by Todd Helms.
These are quite rare for Conoco. While Conoco used Wayne 60 and Wayne 70 gas pumps extensively in the late 1930's and early 1940's, they had purchased an interest in Martin & Schwartz in 1945 and began using the new M&S 80 almost exclusively for the next decade or so. While Conoco - and the other three oil company owners - sold out of M&S in 1949, Conoco at that time (and presumably the others too) signed a 5 year contract to purchase M&S pumps - which took their buying of M&S pumps into 1954. Thus, the entire time that the Wayne 100-A was being produced Conoco was buying almost exclusively from M&S. (When the 5-year contract expired, Conoco tended to favor the Tokheim 300).
I suspect the very few examples of Wayne 100-A pumps at Conoco stations were pumps that were purchased by an independent dealer before conversion to Conoco.